<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    public function up()
    {
        // 无需操作，字段已在创建表的迁移中定义
    }

    public function down()
    {
        // 无需操作
    }
};